Pump



H. ALLEN Sept. 7, 1937.

PUMP

Filed May 14, 1934 Herbert A Z1 en INVENTOR.

v ATTORNEY.

Patented Sept. 7, 1937 UNITED STATES PUMP Herbert Allen, Houston, Tex., assignor, by mesne assignments, to Abercrombie Pump Company, Houston, Tex., a corporation of Texas Application May 14, 1934, Serial No. 725,569

' Claims. (Cl. 103-44) This invention relates generally to pumps.

It will be found particularly useful in pumps designed for pumping abrasive and corrosive fluid of the general type disclosed by Letters Patent of the United States to Stephens No. 1,848,441 of March 8, 1932. A conventional pump of this type adapted for use as a mud or slush pump in deep well drilling includes a barrel; inlet and outlet valves therefor; a hollow expansible member within the barrel; and a reciprocable piston to actuate pumping fluid confined within the expansible member to cause expansion. and contraction thereof whereby pumped fluid is drawn into and forced out of said barrel.

In pumps of other types the pumped fluid is in contact with the piston and rod and carries away the heat generated by the reciprocation of the piston and rod through conventional packings. In the type of pump to which this invention re-v lates, however, the piston and rod are sealed off from the fluid being pumped and the heat so generated is therefore transferred to the pumping fluid within the expansible member. These expansible members are usually made of rubber, which is a very good heat insulator, and the pumping fluid within the expansible member is in contact with very little metal. Under certain conditions, such as when the packings are inadvertently made too tight, the heat is not dissipated as rapidly as it is generated. And so, under such conditions, the pumping fluid in the expansible member will reach a very high temperature whereby the expansible member will be injured; and when the pressure on the pumping fluid is reduced on the suction stroke of the piston, the pumping fluid will boil so that the pumping member will remain expanded, which renders the pump inoperative.

This invention has for its general object the provision of new and improved means to prevent heating of the pumping fluid to an objectionably high temperature by cooling the pumping fluid to remove the heat as it is generated.

A specific object of the invention is to provide means to so cool the pumping fluid with the pumped fluid as a coolant.

Another specific object is to so cool the pumping fluid by circulating therethru but not in contact therewith a coolantfrom an external source independently of the pump.

A further specific object is to prevent the attainment of an objectionably high temperature of the pumping fluid in either of the pumping members of a double barrel pump, by providing a new and improved cooler disposed in one of will form the said members and extending into a hollow piston which in turn extends into the other of said members.

The invention also has for another of its objects the provision of new and improved means where- 5 is a partly sectional elevation of the pump.

As the operation of this pump is clearly set forth in said patent to Stephens No. 1,848,441, it will be but briefly referred to here as follows:

The two barrels of the pump are indicated at l and 2. The inlet and outlet means for the former are indicated at 3 and 4, respectively; and for the latter at 5 and 6, respectively. The inlet means 3 and 5 communicate .with a common inlet passageway l, and outlet means 4 and 6 with a common outlet passageway 8. Within the barrels I and 2 are hollow expansible pumpingmembers 9 and It, the former being sealed at its opposite ends to the end walls of the barrel I at H and I2, and the latter being sealed at its opposite ends to the end walls of the barrel 2 at l3 and I4. The numerals I5, l6 l1 and I8 indicate rings whereby the expansible members 9 and I 0 are connected to the end walls of the barrel. These subject matter of another'application. i

The piston is indicated at l9 extending through the packings 20 and 2| into the expansible members 9 and It), said packings 20and 2| being held in place by means .of the glands 22 and 23 secured by the ring nuts 24 and 25. Extending from the piston l9 through the packing 26 is the rod 28.

The piston l9 may be reciprocated by the rod 28 and it will serve to displace the pumping fluid confined within the expansible members 9 and ID to alternately expand and contract said members. When the piston I9 is in the. position shown the pumping member I0 is in its normal cylindrical shape, and the pumping member v9 is in its expanded shape. When the piston moves to the right the pumping member ll) will be expanded, and the pumping member 9 will resumeits normal cylindrical shape. The valves (not shown) of the inlet means 5 and outlet means 4 will then be closed, and the valves (not shown) of the inlet means 3 and outlet means 6 will be open, so that the pumped fluidconfined in the barrel 2 will be expelled through the outlet means 6 and passageway 8, and a fresh charge 'of pumped fluid will be drawn into the barrel I through the inlet passageway l and inlet means 3. When the piston l9 moves in the opposite direction into the position shown by solid lines, the valves (not shown) of the inlet means 5 and outlet means 4 will open, and the valves (not shown) of inlet means 3 and outlet means 6 will close, so that the pumped fluid within the barrel I will be expelled through the outlet means 4 and passageway 8, and a fresh charge of fluid will be drawn into the barrel 2 through the inlet passageway 1 and inlet means 5. It will be obvious that as the piston |9 reciprocates, this operation will be repeated.

Referring now to the new and improved means provided by this invention to prevent heating of the pumping fluid confined within the pumping members 9 and III to an objectionably high temperature by the reciprocation of the piston l9 and rod 28 through the packings 20, 2| and 26.

It will be noted that the piston I9 is hollow, and that end adjacent the pumping member ID is open. The numeral 30 indicates a cooler, which, in the form shown, comprises a bent pipe supported by. the end wall of' the barrel 2 and extending inwardly thru pumping member ID into piston l9 to a point adjacent packings 20 and 2|. The cooler is connected by the pipes 3| and 32 to the outlet passageway 8, and by the pipes 33 and 34 to the inlet passageway I. The cooler 3|] is also connected by the pipes 3| and 35 and by the pipes 33 and 36 to an external coolant source of supply, including the coolant pump 31. Ihe pipes 32, 34, 35 and 36 are provided with valves 38, 39, 40 and 4|, as shown.

Now if the valves 40 and 4| are closed, and the valves 38 and 39 opened, a portion of the pumped fluid discharged thru the outlet passageway 8 will pass thru the pipes 32 and 3| into the cooler 30, and thence thru the pipes 33 and 34 into the inlet passageway I. As the hollow piston |9 extends into both pumping members 9 and I0 and the cooler extends thru the pumping fluid in pumping member l0 and into piston l9 to a point adjacent packings 20 and 2|, the pumping fluid in both members l0 and II will be thereby prevented from attaining objectionably high temperatures.

If the valves 38 and 39 are closed and valves 40 and 4| are opened, and the coolant pump 31 operated, a coolant may be forced from an external source of supply through the pipes 35 and 3| into the cooler 30 (to prevent the excessive generation of heat) and thence thru the pipes 33 and 35 back to the source of coolant supply.

It will be apparent in view of the foregoing that the heat is efliciently removed from the pumping fluid in the expansible members 9 and I0 as it is generated by the piston and rods and their packings.

It will be understood that if the pump is operated in a very low temperature so that there exists danger of freezing of the pumping fluid, or

of lowering of the temperature thereof to an objectionably low point, the valves 38 and 39 may be closed and the valves 40 and 4| opened,

and the pump 31 operated to force a heating fluid from an external source of supply through the pipes 35 and 3| into the pipe 30 (the pipe 30 then serving as a heater to raise the temperature of the pumping fluid within the expansible members 9 and Ill) and thence through the pipes 33 and back to the source of heating fluid supply.

The invention is not limited to the preferred embodiment here disclosed. Various changes will occur to those skilled in the art, and may be made within the scope of the following claims:

I claim:

1. A pump having a pair of barrels; inlet and outlet means for said barrels; a hollow expansible pumping member in each of said barrels; pumping fluid in said members; piston packings in said barrels; a piston extending through said packings into said members and reciprocable to actuate said pumping fluid to effect the expansion and contraction of said members to draw pumping fluid into said barrels through said inlet means, and to expel it from said barrels through said outlet means; said piston being hollow; and a cooler mounted in one end of one of said barrels and extending through the expansible member in said barrel into said piston to a point adjacent said packings; said cooler communicating with said inlet means and outlet means so that a portion of the pumped fluid discharged through said outlet means will pass through said cooler and into said inlet means.

2. A pump having a pair of barrels; inlet and outlet means for said barrels; a hollow expansible pumping member ineach of said barrels; pumping fluid in said members; piston packings in said barrels; a piston extending through said packings into said members and reciprocable to actuate said pumping fluid to effect the expansion and contraction of said members to draw pumping fluid into said barrels through said inlet means, and to expel it from said barrels through said-outlet means; said piston being hollow; and a cooler mounted in one end of one of said barrels and extending through the expansible member in said barrel into said piston to a point adjacent said packings; said cooler communicating with said outlet means so that a portion of the pumped fluid discharged through said outlet means will pass through said cooler.

3. A pump having a pair of barrels; inlet and outlet means for said barrels; a hollow expansible pumping member in each of said barrels; pumping fluid in said members; piston packings in said barrels; a piston extending through said packings and reciprocable to actuate said pumping fluid to effect the expansion and contraction of said members to draw pumping fluid into said barrels through said inlet means, and to expel it from said barrels through said outlet means; said piston being hollow; and a cooler extending through the expansible member in one of said barrels into said piston to a point adjacent said packings; said cooler communicating with said outlet means so that a portion of the pumped fluid discharged through said outlet means will pass through said cooler.

4. A pump having a pair of barrels; inlet and outlet means for said barrels; a hollow expansible pumping member in each of said barrels; pumping fluid in said members; piston packings in said barrels; a piston extending through said packings and reciprocable to actuate said pumping fluid to effect the expansion and contraction of said members to draw pumping fluid into said barrels through said inlet means, and to expel it from said barrels through said outlet means; a cooler extending into the expansible member in one of said barrels and communicating with said outlet means so that a portion of the pumped fluid discharged through said outlet means will pass through said cooler.

5. A pump having a pair of barrels; inlet and outlet means for said barrels; a hollow expansible pumping member in each of said barrels; pumping fluid in said members; piston packings in said barrels; a piston extending through said packings into said members and reciprocable to actuate said pumping fluid to effect the expansion and contraction of said members todraw pumping fluid into said barrels through said inlet means, and to expel it from said barrels through said outlet means; said piston being hollow; and a cooler mounted in one end of one of said barrels and extending through the expansible member in said barrel into said piston to a point adjacent each of said packings; and means to circulate a coolant thru said cooler independently of said pump.

6. A pump having a pair of barrels; inlet and outlet means forsaid barrels; a hollow expansible pumping member in each of said barrels; pump-.

ing fluid in said members; piston packings in said barrels; a piston extending through said packings and reciprocable to actuatesaid pumping fluid to effect the expansion and contraction of said members to draw pumping fluid into said barrels through said inlet means, and to expel it from said barrels through said outlet means; a cooler extending into the expansible member in one'of said barrels and means to circulate a coolant thru said cooler independently of said pumps.

7. A pump having a barrel; inlet and outlet means for said barrel; a hollow expansible pumping'member in said barrel; pumping fluid in said member; a piston packing; a piston extending through and reciprocable in said piston packing to actuate said pumping fluid to effect the expansion and contraction of said member to draw pumped fluid into said barrel through said inlet means and to expel it from said barrel through said outlet means; said piston being hollow; and a cooler mounted in said barrel and extending through said member into saidpiston to a point adjacent said packing; said cooler communicating with said inlet and outlet means so that a portion of the pumped fluid discharged through said outlet means will pass through said cooler and into said inlet means.

. 8. A pump having a barrel; inlet and outlet means for said barrel; a hollow expansible pumping member in said barrel; pumping fluid in said member; a piston packing; a piston extending through and reciprocable in said piston packing to actuate said pumping fluid to effect the expansion and contraction of said member to draw pumped fluid into said barrel through said inlet means and to expel it from said barrel through said outlet means; said piston being hollow; and a cooler mounted in said barrel and extending through said member into said piston to a point.

adjacent said packing; said cooler communicating with said outlet means so that a portion of the pumped fluid discharged through said outlet means will pass through said cooler.

9. A pump having a barrel; inlet and outlet means for said barrel; a hollow expansible pumping member in said barrel; pumping fluid in said member; a piston packing; a piston extending through and reciprocable in said piston packing to actuate said pumping fluid to effect the expansion and contraction of said member to draw adjacent said packing; and means to circulate a coolant thru said cooler.

10. A pump having a barrel; inlet and outlet means for said barrel; a hollow expansible pumping member in said barrel; pumping fluid in said member; a piston packing; a piston extending through and reciprocable in said piston packing to actuate said pumping fluid to efiect the expansion and contraction of said nlember to draw pumped fluid into said barrel through said inlet means and to expel it from said barrel through said outlet means; said piston being hollow; a cooler extending into said member and said piston; and means to circulate a coolant thru said cooler.

11. A pump having a barrel; a hollow expansible pumping member in said barrel; pumping fluid in said member; a piston to actuate said pumping fluid; a cooler extending into said member and said piston; and means to circulate a coolant thru said cooler.

12. A pump having a barrel; an expansible pumping member in said barrel; pumping fluid in said member; means to actuate said pumping fluid to cause said member to pump fluid through said barrel; and a cooler in said member and communicating with said barrel so that a portion of the pumped' fluid discharged by said barrel will pass through said cooler. 13. The method of controlling the temperatur of pumping fluid actuated within a hollow expansible pumping member to expand and con- 1 tract said member, which consists in subjecting said pumping fluid to the cooling action of the fluid being pumped by passing a portion of the pumped fluid through but not in contact with said pumping fluid.

14. A pump having a barrel; an expansible pumping member in said barrel; pumping fluid in said member; means to actuate said pumping fluid to cause said member to pump fluid through said barrel; a heater in said member; and means to introduce a heating fluid into said heater.

15. A pump having abarrel; an expansible pumping member in said barrel; pumping fluid in said member; means to actuate said pumping fluid to cause said member to pump fluid through said barrel; and a heater in said pumping fluid to keep said pumping fluid at a predetermined temperature.

16. A pump having a barrel; an expansible pumping member sealed in said barrel; pumping fluid in said member; means to actuate said pumping fluid to cause said member to pump fluid through said barrel; a heat transfer unit interiorly of said expansible member; a fluid medium passing through said heat transfer unit; said unit arranged to effect a heat transfer between the pumping fluid in said expansible member and the fluid medium in said heat transfer unit.

- 17. A pump having a barrel; an expansible ing fluid in said member; means to actuate said pumping fluid to cause said member to pump fluid through said barrel; heat transfer meansin said member, means to actuate said pumping pumping member sealed in said barrel; pumpfluid to cause said member to pump fluid through said barrel, and means for passing through the pumping fluid but out of intimate contact therewith a fluid medium of different temperature from said pumping fluid to regulate the temperature of said pumping fluid.

19. A pumphaving a barrel, inlet and outlet means for said barrel, a hollow expansible pumping member in said barrel, pumping fluid in said member, a piston packing, a piston extending through and reciprocable in said piston packing to actuate said pumping fluid to efiect the expansion and contraction of said member to draw pumped fluid into said barrel through said inlet means, and to expel it from said barrel through said outlet means, said piston being hollow, and means to circulate a cooling fluid through said piston.

20. A pump having a hollow expansible pumping member, a pumping fluid in said member, a piston movable in said pumping fluid to actuate said pumping member, and means to cause the fluid pumped by said member to circulate through the interior of said piston.

HERBERT ALLEN. 

